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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef nsTransform2D_h___
- #define nsTransform2D_h___
-
- #include "gfxCore.h"
- #include "nsCoord.h"
- #include "nsUnitConversion.h"
-
- #define MG_2DIDENTITY 0
- #define MG_2DTRANSLATION 1
- #define MG_2DSCALE 2
- #define MG_2DGENERAL 4
-
- class NS_GFX nsTransform2D
- {
- private:
- //accelerators
-
- float m00, m01, m10, m11, m20, m21;
- PRUint16 type;
-
- public:
- //constructors
-
- nsTransform2D(void) { SetToIdentity(); }
- nsTransform2D(nsTransform2D *aTransform2D) { SetMatrix(aTransform2D); }
-
- //destructor
-
- ~nsTransform2D(void) { }
-
- /**
- * get the type of this transform
- *
- * @param
- * @return type from above set
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- PRUint16 GetType(void) { return type; }
-
- /**
- * set this transform to identity
- *
- * @param
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void SetToIdentity(void) { m01 = m10 = m20 = m21 = 0.0f; m00 = m11 = 1.0f; type = MG_2DIDENTITY; }
-
- /**
- * set this transform to a scale
- *
- * @param sx, x scale
- * @param sy, y scale
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void SetToScale(float sx, float sy);
-
- /**
- * set this transform to a translation
- *
- * @param tx, x translation
- * @param ty, y translation
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void SetToTranslate(float tx, float ty);
-
- /**
- * get the translation portion of this transform
- *
- * @param pt, Point to return translation values in
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void GetTranslation(float *ptX, float *ptY) { *ptX = m20; *ptY = m21; }
- void GetTranslationCoord(nscoord *ptX, nscoord *ptY) { *ptX = NSToCoordRound(m20); *ptY = NSToCoordRound(m21); }
-
- /**
- * set the translation portion of this transform
- *
- * @param tx, x translation
- * @param ty, y translation
- * @exception
- **/
-
- void SetTranslation(float tX, float tY) {
- m20 = tX;
- m21 = tY;
- type |= MG_2DTRANSLATION;
- }
-
- /**
- * get the X translation portion of this transform
- *
- * @param
- * @returns x component of translation
- * @exception
- **/
-
- float GetXTranslation(void) { return m20; }
- nscoord GetXTranslationCoord(void) { return NSToCoordRound(m20); }
-
- /**
- * get the Y translation portion of this transform
- *
- * @param
- * @returns y component of translation
- * @exception
- **/
-
- float GetYTranslation(void) { return m21; }
- nscoord GetYTranslationCoord(void) { return NSToCoordRound(m21); }
-
- /**
- * set this matrix and type from another Transform2D
- *
- * @param aTransform2D is the Transform2D to be copied from
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void SetMatrix(nsTransform2D *aTransform2D);
-
- /**
- * post-multiply a new Transform
- *
- * @param newxform new Transform2D
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void Concatenate(nsTransform2D *newxform);
-
- /**
- * pre-multiply a new Transform
- *
- * @param newxform new Transform2D
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void PreConcatenate(nsTransform2D *newxform);
-
- /**
- * apply nontranslation portion of matrix to vector
- *
- * @param pt Point to transform
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void TransformNoXLate(float *ptX, float *ptY);
- void TransformNoXLateCoord(nscoord *ptX, nscoord *ptY);
-
- /**
- * apply matrix to vector
- *
- * @param pt Point to transform
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void Transform(float *ptX, float *ptY);
- void TransformCoord(nscoord *ptX, nscoord *ptY);
-
- /**
- * apply matrix to rect
- *
- * @param rect Rect to transform
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void Transform(float *aX, float *aY, float *aWidth, float *aHeight);
- void TransformCoord(nscoord *aX, nscoord *aY, nscoord *aWidth, nscoord *aHeight);
-
- /**
- * Scale an array of X/Y coordinates by the X/Y scale factor in the
- * matrix. The scale is done as if the other coordinate were zero.
- *
- * @param aSrc Base of coordinate input array
- * @param aDst Base of coordinate output array
- * @param aNumCoords Number of coordinates to scale
- */
- void ScaleXCoords(const nscoord* aSrc, PRUint32 aNumCoords, PRIntn* aDst);
- void ScaleYCoords(const nscoord* aSrc, PRUint32 aNumCoords, PRIntn* aDst);
-
- /**
- * add a translation to a Transform via x, y pair
- *
- * @param ptX x value to add as x translation
- * @param ptY y value to add as y translation
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void AddTranslation(float ptX, float ptY);
-
- /**
- * add a scale to a Transform via x, y pair
- *
- * @param ptX x value to add as x scale
- * @param ptY y value to add as y scale
- * @exception
- * @author michaelp 09-25-97 1:56pm
- **/
-
- void AddScale(float ptX, float ptY);
-
- private:
- nscoord ToCoordRound(float aCoord);
- };
-
- #endif
-